Window-lock.



110.761,74?. l PATBNTBD-JUNB?,1904.." A. ZWIEBEL, sn. WINDOW 1.00K.

N0 IODEL.

@mi luaosca vv f gnowwi.

' 4 D. cf we Naim: ravens co. Pnofomwq, msmncmu UNITD 'STATES4 Patented June '7, 1904.

PATENT OFFICE.

4WINDOW-'LOCK SPECIFICATION forming part of Letters Patent No. 761,747, dated June 7, 1904.

l Application filed August 14, 1903. Serial No. 169,492. v(Model.)A

To a/ZZ whom, t Inay concern.-

Be it known that I, ANTON ZWIEBEL, Sr., a citizen of the United States, residing at Burlington, inthe county of Racine and State of Wisconsin, have invented certain new and useful Improvements in VVindow-Locks, of which the following is a specification.

- This invention comprises a peculiar form of a locking device intended in its adaptation for use upon windows to prevent opening thereof, though applicable in various other ways in its locking capacity.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following descriptionand drawings hereto attached.

While "the essential and characteristic features of the invention are susceptible of modiiication, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view showing the invention applied to a window for locking sash thereof. Fig. 2 is a view looking from the under side of the casing of the device, showing more particularly the exact construction of the latch-bolt. Fig. 3 is a detail perspective view of the latch-bolt.

' Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by thesa'me reference characters.

The locking device is preferably applied to the upper side of the uppermost cross-bar of the lower sash 1, and consists of three parts only. rI he parts aforesaid are the easing 2, latch-bolt 3, and spring 4. The latch-bolt 3 is adapted for a slidable movement transversely ofthe casing 2, being mounted thereon so as to pass through openings 5, located upon corresponding sides of the said casing. A finger-piece 6 is formed upon one end of the latch-bolt and serves as means for operating the latter, so as todispose same in or out of lock engagement relative to the upper sash 7. The latch-bolt Sis yalso provided with a lock-bar 8, which is spaced from the latchbar and disposed substantially in a parallel relation thereto, and an opening 9 upon the casing receives the lock-bar, which moves within the casing onA operation of the latchbolt, and said opening directs the movement of the lock-bar in a manner readily apparent. Inforder to lock the latch-bolt in engagement with the upper sash and also to lock the samev out of engagement therewith, the lock-bar is provided with notches l0, which engage the casing at a point adjacent to the opening 9 and hold the latch-bolt in the positions before mentioned upon operation of the bolt by means of the finger-piece 6. A stop-pin 11 is carried by the lock-bar 8, and the coil-spring 4 is disposed about the lockbar intermediate the inner side of the casing and the aforesaid pin ll. The coil-spring 4 normally tends to hold the lock-bolt in engagement with the upper sash and atthe same time exerts a lateral tension, so as to normally throw the notches 10 of the lock-bar into engagement with the casing. The coil-spring thus exerts a longitudinal and lateral pressure upon the lock-bar, being especially advantageous for this reason. A base-plate 12 is used to close-the open face of the casing,

which is secured to the lower sash by meansA Of screw-fastenings or the like. A number of recesses 13 are located upon the side member of the upper sash to receive the end of the latch-bolt, so as to lock the sash together..

A reinforcing-plate 14, with openings corresponding to the recesses 13 lrelative to their disposition, is used to reinforce the said recesses forobvious reasons.

The lock device embodied in the invention is exceedingly simple as to the number of parts involved in this structure and constitutes a very eflicient means for locking parts together.V The liability of working the locking elements from locking engagement is entirely avoided, Since the latch-bolt is held in positive engagement at all times when the same has been properly operated.

Having thus described the invention, what is claimed as new is- 1. In a lock, the combination of a casing, a lock-bar slidably mounted Within the casing, lateral interlocking means between the lockbar and casing to hold the lock-bar at 'any re- IOO quired position in its longitudinal movement, and a spring normally exerting a longitudinal A and a lateral pressure upon the lock-bar, substantially as specified.

2. In a lock, the combination of a easing, a lock-bar sliclalole Within the casing, interlocking means between the lock-bar and easing, a spring mounted upon the lock-bar and no1'- mally exerting a pressure thereon in the direction of its length and at a right angle to the longitudinal movement, a latclrbolt spaced from and movable with the lock-liar :1nd adapted to be projected beyond the casing and a linger-piece at the juncture of the lock-bar and latch-bolt, substantially as speciied.

In testimony whereof l ailix my signature in presence of two witnesses.

ANTON ZVIEBEL, SR.

fitnessesz F. REUSCHLEIN, J. Gr. MATnmvs. 

